As of today (12/23/2022), the free version, Mconnect Player Lite, is working smoothly with ifi ZS in the AIO mode on iphone for streaming music from Qobuz. It has most of features you need such as gapless play. If you need track sorting which I don’t really care for, go with Mconnect Player. The sound quality is really good, just a tad better than playing the files from SSD via USB but I am spliting the hair. Both are noticeably better than playing / steaming music out of MS-window PC / Macbook. I start streaming music from Qobuz from now on because of the SQ, convenience and grand selection of music of all genres. I think $120 per year is well worth it.
Note that, after you setup the ifi ZS player and Mconnect Player, for some reasons it may take a few hours (in my case) for ifi / iFi icon to eventually show up in the UPnP devives field. Just be patient.